Remove redundant hierarchy flags

[HardNorth]

service.PyTestServiceClass.collect_tests method is too complex to support. We need to remove the following flags to simplify it:

• rp_display_suite_test_file
• rp_hierarchy_dir_path_separator
• rp_hierarchy_dirs_level
• rp_hierarchy_parametrize
• rp_hierarchy_class
• rp_hierarchy_module
• rp_hierarchy_dirs

[HardNorth]

Done in https://github.com/reportportal/agent-python-pytest/tree/5.1